Chang'e 2 Toutatis flyby encounter geometry

CAST

Chang'e 2 Toutatis flyby encounter geometry

This diagram is in the reference frame of the spacecraft, meaning that the spacecraft is considered fixed and the asteroid appears to be moving from left to right across the diagram. In this reference frame, the asteroid moved with a relative velocity of 10.7277 kilometers per second, and the minimum separation between the spacecraft and asteroid was 770±120 meters.